/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef _U2_DOCUMENT_IMPORT_H_
#define _U2_DOCUMENT_IMPORT_H_

#include <QDialog>

#include <U2Core/DocumentModel.h>

namespace U2 {

class DocumentImporter;
class DocumentProviderTask;
class FormatDetectionResult;
class ImportWidget;

class U2CORE_EXPORT ImportDialog : public QDialog {
    Q_OBJECT
public:
    ImportDialog(const QVariantMap &_settings)
        : settings(_settings) {
    }

    const QVariantMap &getSettings() const {
        return settings;
    }

public slots:
    virtual void accept();

protected:
    virtual bool isValid() {
        return true;
    }    // it is not const method: derived class can do something non-const
    virtual void applySettings() = 0;

    QVariantMap settings;
};

class ImportWidgetFactory {
public:
    virtual ~ImportWidgetFactory() {
    }

    virtual ImportWidget *getWidget(const GUrl &url, const QVariantMap &settings) const = 0;
};

/** Registry for all DocumentImportHandlers */
class U2CORE_EXPORT DocumentImportersRegistry : public QObject {
    Q_OBJECT
    Q_DISABLE_COPY(DocumentImportersRegistry)
public:
    DocumentImportersRegistry(QObject *p = NULL)
        : QObject(p) {
    }
    ~DocumentImportersRegistry();

    /** returns handler by its id */
    DocumentImporter *getDocumentImporter(const QString &importerId) const;

    /** registers new document import handler */
    void addDocumentImporter(DocumentImporter *i);

    const QList<DocumentImporter *> &getImporters() const {
        return importers;
    }

private:
    QList<DocumentImporter *> importers;
};

class U2CORE_EXPORT DocumentImporter : public QObject {
    Q_OBJECT
    Q_DISABLE_COPY(DocumentImporter)
public:
    DocumentImporter(const QString &_id, const QString &_name, QObject *o = NULL)
        : QObject(o), id(_id), name(_name), widgetFactory(NULL) {
    }

    virtual ~DocumentImporter() {
        delete widgetFactory;
    }

    virtual FormatCheckResult checkRawData(const QByteArray &rawData, const GUrl &url) = 0;

    virtual DocumentProviderTask *createImportTask(const FormatDetectionResult &res, bool showGui, const QVariantMap &hints) = 0;

    virtual QString getRadioButtonText() const;

    virtual ImportWidget *createImportWidget(const GUrl &url, const QVariantMap &settings) const;

    virtual QString getImporterDescription() const {
        return importerDescription;
    }

    const QString &getImporterName() const {
        return name;
    }

    const QString &getId() const {
        return id;
    }

    const QStringList &getFormatIds() const {
        return formatIds;
    }

    const QList<QString> &getSupportedFileExtensions() const {
        return extensions;
    }

    void setWidgetFactory(ImportWidgetFactory *factory);

    const QSet<GObjectType> &getSupportedObjectTypes() const;

    // NOTE: it is hint, it should be true by default
    static const QString LOAD_RESULT_DOCUMENT;

protected:
    QString id;
    QString name;
    QStringList formatIds;
    QList<QString> extensions;
    QString importerDescription;
    ImportWidgetFactory *widgetFactory;
    QSet<GObjectType> supportedObjectTypes;
};

}    // namespace U2

#endif
